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Classifications

F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL

F16H—GEARING

F16H7/00—Gearings for conveying rotary motion by endless flexible members

F16H7/02—Gearings for conveying rotary motion by endless flexible members with belts; with V-belts

F16H7/023—Gearings for conveying rotary motion by endless flexible members with belts; with V-belts with belts having a toothed contact surface or regularly spaced bosses or hollows for slipless or nearly slipless meshing with complementary profiled contact surface of a pulley

F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING

F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL

F16H—GEARING

F16H57/00—General details of gearing

F16H57/12—Arrangements for adjusting or for taking-up backlash not provided for elsewhere

Abstract

Noise and vibration of a helically-toothed-belt transmission device driven under heavy load or at a high-speed rotation, are reduced. A backlash "D" is selectively enlarged in a helically-toothed-belt transmission device that transmits drive force by meshing between a helically toothed belt and a helically toothed pulley. That is, a tooth helix angle ".theta." is set in a range of -0.2 <= 1- W .cndot. tan.theta. / Pt <= 0.75, with "Pt" being a tooth pitch, ".theta." a tooth helix angle, and W the width of the belt. The backlash "D" between the helically toothed belt and the helically toothed pulley is set to be 1.6%-3% of the tooth pitch "Pt".